JPS63126618A - Bending press - Google Patents

Abstract

PURPOSE:To improve the safety in working and to automatize the working by arranging the press part including an upper and lower dies inclinably to a base centering around nearly the recessed groove part of the lower die. CONSTITUTION:The guide 8 for inclination equipped with a circular arcuate guide part 2 on the base 1 is provided and the guide part 2 is formed in the shape of a circular arc located near the recessed groove 7a of the lower die 7 and yet centering around the straight line extending in parallel. The teeth of a worm gear, etc., are provided concentrically with the circular arcuate part 2 on a whirling frame 4 and made revolvable according to the bending angle of the lower die 7 and upper die 11. In case of a plate stock 17 being bent in the space with the lower die 7 by the descent of the upper die 11, a motor 14 is driven according to the spring-up angle at both ends of the plate stock 17 to incline the whole press part P. Consequently owing to the spring-up of the long bulging part at the right part being constrained, the safety in the work is improved and a pressing can be automatized.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a press that bends a plate material such as a steel plate by placing it on an uneven bottom plate and an upper mold, and the present invention relates to a press that bends a plate material such as a steel plate by placing it on an uneven bottom plate and an upper die. This relates to the prevention of splashing.

[Conventional technology]

Conventionally, in the above-mentioned bending press, the lower mold is fixed to the base, and the upper mold only moves up and down relative to the upper mold, and presses the plate material placed between the two molds. It was supposed to be bent.

[Problem that the invention seeks to solve]

As mentioned above, conventional bending presses bend the plate material by moving only the vertical direction relative to the lower die and the upper die. I'm going to go up. This spring-up does not pose much of a problem if the length from the bent part to the end is short, but if it is long, it can become a considerable problem depending on the length and the bending angle, which can be dangerous and dangerous. Did it spring up when you opened the mold? 1] falls, which is also dangerous, and the plate material moves due to this fall, which causes the self-'! ! There were problems such as difficulty in automating the h-feeding, ie, bending, work.

[Means to solve the problem]

The present invention is a press that pinches and bends a plate material using a concave and convex lower die and an upper die, in which a press part including the lower die and the upper die is provided so as to be tiltable with respect to the base about the concave groove of the lower die. It is something.

[Effect]

In the present invention, since the press part can be tilted around the concave groove part of the lower die as described above, for example, when bending the phantom part of the plate material, the other end part does not spring up. [Example] An example of the present invention will be shown below! Figure c1 will be explained. Reference numeral 1 denotes a base, which includes a tilting guide 8 having an arc-shaped guide portion 2. A rotating frame 4 is mounted on the tilting guide 8 so as to be movable along the arcuate guide portion 2. Note that 5 is the guide shaft minus 5. In the F'J frame assembly, a lower wall holder 6 is used, and a lower mold 7 is attached so as to be replaceable.

Here, the arc-shaped real interior 2 is a concave for bending the lower mold 7.
It is located in the vicinity of ff7a (preferably on the right edge of groove 7- in Fig. 1) and is formed in an arc shape centered on a straight line extending parallel to groove 7m.

An upper mold guide 8 is attached to the rotating frame 4.

A slider 9 is slidably attached to the upper mold guide 8,
An upper mold mounting arm lO is fixed to the slider 9, and an upper mold 11 is replaceably mounted on the lower end of this upper mounting arm 10. Further, a cylinder 12 is attached to the upper end of the upper mold guide 8, and its piston rod 13 is connected to the slider 9, so as to press against the shed 11'f: the lower layer 7. is provided with teeth such as a worm gear concentrically with the arc-shaped guide portion 2, and a worm screw (not shown) driven by a motor 14 is engaged with the teeth. On the other hand, the upper die guide 8 is equipped with a detector 1 for detecting the engagement between the lower die 7 and the upper die U from the position of the slider.
5 is attached, outputs its detection signal to the control unit 16,
The rotating frame 4 is turned according to the bending angle of the plate material 17 by the lower die 7 and the upper die 11.

Further, a hydraulic balancer 18 is connected to the rotating frame Φ. The supply pressure to the valve/sustainer 18 is controlled by the control unit Its
The pressure is adjusted by A, controlled by 4JN adjustment fi 19, lower mold 7, lower mold pedestal 3, rotating frame 4, upper mold guide 8, sliter stand, shed mounting arm 10, upper mold 1
1. The balance force is changed according to the inclination angle of the press part P, which is made up of the cylinder 12 and the piston 13, to compensate for changes in the force applied to the motor 14 etc. due to the inclination of the press part P.

Note that 20 is a pump.

The operation of this device will be explained without explanation.・As shown in Figure 1, bend the left end of the plate 17 at the bending point 17- into the lower mold 7.
The concave it? The right end side is placed on the support 21 attached to the base l so that the plate 17 is horizontal. Next, the cylinder 12 is made and blocked, and the lower die 11 is lowered 4 by the slider υ and the lower die mounting arm lO. When the slider 9 descends to the point where the tip of the lower die 11 contacts the surface of the plate material 17, the position detection device 15
starts position detection, and the amount of descent from the position is controlled by the control unit 1.
Output to 6.

The plate material 17 is moved from the position where the upper die 11 starts contacting the plate material 17.
begins to bend, but this bending is done through the concave groove 7- of the lower die 7.
The left and right ends are lifted up using both ends as fulcrums. Therefore, for the lower mold 7 and upper mold 11 to be used, a relational expression between the amount of descent of the lower mold 11 from the start of contact and the spring-up angle is determined, and the control section 16 controls the amount of descent of the lower mold 11 from The motor 14 is driven according to the relational expression, and the press part P is tilted as shown by the two-dot chain line.

Therefore, the long overhanging portion to the right of the bending point 17- of the plate material 17 in FIG.

On the other hand, the portion to the left of the bending point L7- of the plate 17 in FIG. 1 springs up, but this left part 11 is short and short, so that there are almost no inconveniences caused by the springing up.

When the bending is completed to the desired angle such as 00, open the upper mold 11 or open the upper mold 11.
After completely opening the rotating frame 4, the motor 11 rotates the rotating frame 4.
is moved in the opposite direction to return the press part P to its original upright position.

During the tilting of the press section P, the control section 16 also controls the pressure adjustment device 119 to compensate for the unbalanced force caused by the tilt of the press section P, so that an excessive load does not act on the motor 14. do.

This device is not only effective for bending the ends of the plate material 17 as described above, but also for bending the edges of the plate material 17 as shown in Figure @2.
This also applies when four parts of the hole 2711 provided at 7 are bent as shown by reference numeral 27b. That is, hole 27a'i
If it is passed through the press iP and one side of the edge is bent by the lower die 7 and the upper die 11, only the bent pwszqb will spring up, but the press part P will be inclined in the hole 27-, and the plate material 27 will be horizontal. , and bend the edge 27b.

In the above-mentioned embodiment, the press part P is inclined by the motor 14, but if the press part P is small and relatively lightweight and the inclination can be controlled manually, it is possible to simply make the press part P tiltable. If you keep it, plate material 17.27
The press part P can be tilted manually so that the press part PK is placed in a state where it is supported by the support 21.
In comparison, if the plate material 17.27 has a large weight Jλ and appropriate rigidity, the press part P will naturally follow the bending angle and incline without manual intervention. In addition, balancer 18
may be a single piece simply attached to the lower part of the revolving frame, and is unnecessary if the press part P is small and lightweight.

〔Effect of the invention〕

As described above, according to the present invention, the plate material can be bent without being thrown up significantly, and the work can be carried out safely. There is no movement of the plate material, which has the effect of making it easier to automate the bending process, including loading and unloading the plate material, and also makes it easier to bend the edges of holes drilled in the center of the plate material. You can also get the desired effect.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway side view showing one embodiment of a bending press according to the present invention, and FIG. 2 is a schematic cross-sectional view showing a bent state of the edge of a hole in a plate material. 1... Base, 8... Tilt guide, Hand... Swivel frame, 7... Lower die, ? -...Concave groove, 8...Upper die guide, 9...Slider, 11...Upper die, 12
...Cylinder, 14...Motor, 15...Position detector, 16...Control unit, 17/27...Plate material, 1
8... Balancer, 19... Pressure regulator, P...
press department.

Claims (1)

[Claims] 1. In a press in which a plate material is clamped and bent by a pair of uneven lower and upper dies, the press part including the lower dies and the upper die is centered approximately at the concave groove of the lower dies with respect to the base. A bending press characterized by being provided so as to be tiltable. 2. The bending press according to claim 1, wherein the press part is connected to a drive means that controls the amount of inclination according to the amount of engagement between the lower mold and the upper mold. 3. The bending press according to claim 1 or 2, wherein the press part is provided with a balancer for preventing inclination.